MULTIPLE CHOICE (3 points each) 1) In which diagram does the charged particle experience zero magnetic force? A) BJ DJ Both A & B B B 1 = 0 2v 2) Which field diagram best characterizes a bar magnet's magnetic field? A) 00 00 00 3) A wire with electric current flowing to the left in the -x direction is placed within a magnetic field directed towards the top in the +y direction. What is the B direction of the magnetic force acting on the wire? A) To the left (-x) D) Towards the top (+y) B ] To the right (+x) E) Into the page (-z] C) Towards the bottom (-y) F) Out of the page (+z] 4) A positively-charged particle enters a region of magnetic field and travels in a clockwise curved trajectory. What is the direction of the magnetic field in this region? A) To the left (-x) D) Towards the top (+ y) B] To the right (+x) E) Into the page (-z) `Towards the bottom (-y) F) Out of the page (+2)5) A loop of wire with sides of length L is placed within a constant magnetic field B directed out of the page. If counter-clockwise current i flows through the loop, what is the magnitude of the net magnetic O force on the loop? A) LiB/4 O B) LIB X C) Zero D) 2LIB E) 4LIB OB (continued on back side) F FREE RESPONSE (30 points total) - You must show your work to receive credit. 6) Two long wires are placed perpendicular to each other. (They cross over one another, but T do not touch.] In wire @, a current of /, = 4.00 A flows in the +y direction. In wire @, a current of 12 = 0.500 A flows in the -x direction. Point P is located a distance d, = 2.00 cm from wire @ and a distance dy = 1.00 cm from wire @. (20 points) a) Find the magnitude of the magnetic field generated by B = wire D at point P d1 b) Find the magnitude of the magnetic field generated by B = wire @ at point P. c) Find the magnitude of the net B = magnetic field at point P. d) Find the direction of the net magnetic field at point P